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Optical transmission device
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Patent number 7,379,674
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Issue date May 27, 2008
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Canon Kabushiki Kaisha
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Fumiaki Usui
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Zoom lens
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Patent number 6,124,982
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Issue date Sep 26, 2000
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Canon Kabushiki Kaisha
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Fumiaki Usui
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G02 - OPTICS
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Zoom lens
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Patent number 5,995,297
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Issue date Nov 30, 1999
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Canon Kabushiki Kaisha
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Fumiaki Usui
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G02 - OPTICS
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Zoom lens
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Patent number 5,995,296
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Issue date Nov 30, 1999
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Canon Kabushiki Kaisha
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Fumiaki Usui
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G02 - OPTICS
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Zoom lens
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Patent number 5,751,497
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Issue date May 12, 1998
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Canon Kabushiki Kaisha
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Fumiaki Usui
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G02 - OPTICS
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Zoom lens
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Patent number 5,583,700
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Issue date Dec 10, 1996
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Canon Kabushiki Kaisha
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Fumiaki Usui
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G02 - OPTICS
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